Al Kooper is the Zelig of pop and rock music. While his discography is riddled with WTF? moments (he penned the 1960 novelty hit "Short Shorts" at age 16, scored The Banana Splits TV show, produced Lynyrd Skynyrd, etc.), he's a crucial figure in music history. Among many other things, Kooper supplied rollicking keyboards on Bob Dylan's "electric" mid-'60s albums and helmed the soulful Super Session with Mike Bloomfield and Stephen Stills. Kooper is a musical encyclopedia. A ridiculously sublime evening awaits you. (Triple Door, 216 Union St, 838-4333. 7:30 pm, $25, all ages.)